An ultrasonic endoscope

Abstract

The utility model discloses an ultrasonic endoscope, include: the insertion part, including for inserting into the body's insertion pipe and the insertion pipe sleeve connected in the insertion pipe proximal end, operating part, including the fixed pipe of connecting in the insertion part sleeve proximal end, the compression ring is screwed on the outer periphery of insertion pipe sleeve, the proximal end and the distal end of fixed pipe are opposite, and the compression ring is used for realizing the axial compression of insertion pipe sleeve and fixed pipe, adjustable locking piece, along the radial activity of fixed pipe is connected in fixed pipe, can lock the relative circumferential rotation between insertion pipe sleeve and fixed pipe completely. Through the adjustable locking piece of radial activity setting of multiple along fixed pipe is additionally established on fixed pipe, through simple dismounting can adjust the installation angle of insertion part, reduces assembly accuracy requirement and operation difficulty, and reduces the size accuracy requirement of insertion pipe sleeve and fixed pipe and other parts, reduces the cost of generation, improves product yield.

Description

Technical Field

[0001] This utility model relates to the field of endoscopy technology, specifically to an ultrasonic endoscope. Background Technology

[0002] An endoscopic ultrasound system mainly consists of an operating section and an insertion section. The operating section includes a base fixation tube, and the insertion section includes an insertion tube for insertion into the body and an insertion tip connected to the distal end of the insertion tube. The insertion tip includes a tip seat and an ultrasound probe connected to the distal end of the tip seat. The proximal end of the insertion tube is inserted into the base fixation tube of the operating section. Screws pass through the base fixation tube and the insertion tube to connect them together, and glue is applied to fix them in place, thereby preventing the insertion tube from rotating.

[0003] This method of fixing the insertion tube and the operating part means that once the insertion tube is fixed, it cannot be rotated. After the insertion part and the operating part are assembled, if the installation angle of the headstock on the insertion part is not within the required range, the installation angle of the headstock cannot be adjusted, rendering the ultrasonic endoscope unusable.

[0004] However, during the assembly of the insertion and operating parts, workers may easily rotate the insertion tube, which has been adjusted to the correct angle, by a certain angle, causing a deviation in the actual installation angle of the insertion tube and affecting the product yield. Therefore, there is a need for an ultrasonic endoscope that has low requirements for assembly precision and is easy to adjust the installation angle of the insertion tube after assembly. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an ultrasonic endoscope to solve the problems of existing ultrasonic endoscopes having high requirements for assembly precision and being unable to further adjust the installation angle of the insertion tube after the insertion part is fully assembled.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] An ultrasound endoscope, comprising:

[0008] The insertion part includes an insertion tube for insertion into the body and an insertion tube sleeve connected to the proximal end of the insertion tube;

[0009] An operating part is connected to the proximal end of the insertion part, the operating part including a fixing tube, the proximal end of the insertion tube sleeve being able to extend into the fixing tube;

[0010] A clamping ring is threaded to the outer periphery of the insert sleeve, with its proximal end abutting against the distal end of the fixed tube. The clamping ring is used to achieve axial clamping of the insert sleeve and the fixed tube.

[0011] An adjustable locking member is movably connected to the fixed tube along the radial direction of the fixed tube; when the adjustable locking member abuts against the outer wall of the insertion tube sleeve, the adjustable locking member can completely lock the relative circumferential rotation between the insertion tube sleeve and the fixed tube.

[0012] Furthermore, the outer surface of the insertion tube sleeve is provided with a knurled structure, and the adjustable locking member has a pointed end facing the insertion tube sleeve. The pointed end abuts against the knurled structure to achieve locking.

[0013] Furthermore, the knurling structure is a straight-knurled knurling structure, the modulus of the straight-knurled knurling structure is not greater than 0.3, and the pointed end is locked between two adjacent straight lines of the straight-knurled knurling structure to achieve locking.

[0014] Furthermore, multiple adjustable locking elements are evenly arranged along the circumference of the fixed tube.

[0015] Furthermore, the insertion tube sleeve is a tapered tube with a large proximal opening, a small distal opening, and an axial opening on the tube wall. The outer circumference of the insertion tube sleeve is provided with an external thread structure, and the clamping ring is threaded to the external thread structure on the outer circumference of the insertion tube sleeve to axially clamp the insertion tube sleeve.

[0016] Furthermore, the outer periphery of the insertion tube sleeve is provided with an annular groove located near the end of the external thread structure, and the near end of the fixing tube is provided with an inner positioning protrusion extending into the annular groove. The inner positioning protrusion cooperates with the annular groove to achieve axial positioning of the fixing tube and the insertion tube sleeve.

[0017] Furthermore, it also includes: an anti-rotation locking member, detachably connected to the fixed tube and the insertion tube sleeve, wherein when the anti-rotation locking member penetrates the fixed tube and the insertion tube sleeve, the anti-rotation locking member can restrict the relative circumferential rotation of the insertion tube sleeve and the fixed tube;

[0018] Furthermore, at least two anti-rotation locking elements are provided along the circumference of the fixing tube.

[0019] Furthermore, the wall of the fixed tube is provided with a first mounting hole and a second mounting hole, and the wall of the inserted tube sleeve is provided with an anti-rotation limiting through hole; the anti-rotation locking component is an anti-rotation screw, which is threadedly connected to the first mounting hole and extends into the anti-rotation limiting through hole; the adjustable locking component is a pointed pin, which is threadedly connected to the second mounting hole.

[0020] Furthermore, the outer periphery of the fixing tube is provided with a first external thread, and the proximal end of the insertion tube and the outer periphery of the insertion tube sleeve are provided with a tail sleeve, the inner wall of the tail sleeve being threadedly connected to the first external thread.

[0021] Furthermore, the operating part is provided with an injection port assembly and an instrument port assembly. The directions of the internal channels of the injection port assembly and the instrument port assembly are both set at an angle to the insertion direction of the insertion tube. The distal end of the insertion tube is connected to a headstock, and the distal end of the headstock is connected to an ultrasound probe. A water bladder is installed on the outer periphery of the ultrasound probe. The insertion part and the operating part are provided with independent injection channels and instrument channels. The distal end of the injection channel communicates with the water bladder, and the proximal end of the injection channel communicates with the injection port assembly. The distal opening of the instrument channel is located in the headstock, and a branch tube at the proximal end of the instrument channel communicates with the instrument port assembly. External ultrasound media can be supplied to the water bladder through the injection port assembly and the injection channel, and external diagnostic instruments can extend outward from the headstock through the instrument port assembly and the instrument channel.

[0022] Furthermore, the wall of the fixed tube is provided with a first opening and a second opening, the injection port assembly is connected to the first opening, and the instrument port assembly is connected to the second opening.

[0023] Furthermore, the injection port assembly includes;

[0024] The injection port fixing block is fixedly connected to the inner wall of the fixing tube. The injection port fixing block includes a positioning opening ring, which extends into the first opening and is positioned and engaged with the first opening to restrict the injection port fixing block from rotating around its own axis. The injection port fixing block also forms an inner inclined cavity, and the injection interface tube at the proximal end of the injection channel communicates with the inner inclined cavity.

[0025] The injection port collar is sleeved on the outer periphery of the fixed tube. The injection port collar includes a positioning post that is corresponding to the position of the injection port fixing block and is internally connected. The axial direction of the positioning post is collinear with the axial direction of the inner inclined cavity. The outer wall of the positioning post is provided with a pin groove.

[0026] One end of the injection tube passes through the positioning post and extends into the inclined cavity inside the injection port fixing block; the injection tube is fixedly connected to an anti-rotation pin, one end of which extends into the pin groove of the injection port collar to restrict the injection tube from rotating around its own axis.

[0027] The fourth sealing ring is disposed between the injection tube and the injection port fixing block;

[0028] The fifth sealing ring is disposed between the injection tube and the positioning post;

[0029] The injection locking ring is threaded to the outer circumference of the injection tube and one end abuts against the injection port sleeve, used to lock the injection tube to the injection port sleeve.

[0030] A protective sleeve is fitted around the outer periphery of the injection locking ring.

[0031] Furthermore, the operating part also includes a handle housing, which is sleeved and connected to the outer periphery of the fixed tube.

[0032] The present invention has the following advantages: During the assembly of the insertion part and the operating part, the insertion tube, insertion tube sleeve, head end seat, and ultrasonic probe are assembled to form the entire insertion part. Then, the proximal end of the insertion tube sleeve is inserted into the fixed tube, and the insertion tube sleeve and the fixed tube are axially pressed together using a clamping ring, locking the insertion tube sleeve inside the fixed tube to form an axial rigid support. After the insertion tube sleeve is axially pressed, the adjustable locking member is adjusted to a locking position that abuts against the outer wall of the insertion tube sleeve. The adjustable locking member can lock the relative circumferential rotation of the insertion tube sleeve and the fixed tube. If the anti-rotation locking member can be installed at this time, the anti-rotation locking member is further inserted through the fixed tube and the insertion tube sleeve. The anti-rotation locking member and the adjustable locking member cooperate to constrain the relative circumferential rotation of the insertion tube sleeve and the fixed tube, completely locking the rotational freedom of the insertion tube sleeve. Finally, the tail sleeve is threaded to the outer circumference of the fixed tube, and a sealing ring is used to seal the tail sleeve and the fixed tube. If, after the insertion and operating parts are assembled, the installation angle of the headstock does not conform to the preset installation angle range, rendering the ultrasonic endoscope unusable, the anti-rotation locking component can be removed first, then the clamping ring loosened, and finally the adjustable locking component loosened. The installation angle of the insertion tube fixing sleeve can then be manually adjusted to ensure the headstock installation angle conforms to the preset range. Finally, the clamping ring is retightened and the adjustable locking component tightened. At this point, the anti-rotation locking component no longer needs to be installed. Finally, adhesive reinforcement can be applied to compensate for the installation angle of the headstock not conforming to assembly requirements due to assembly errors. This method of adjusting the insertion angle allows for easy adjustment through simple disassembly, reducing assembly precision requirements and operational difficulty. It also reduces the dimensional accuracy requirements for components such as the insertion tube sleeve and fixing tube, lowering production costs and improving product yield. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1This is a schematic diagram of the overall structure of the ultrasonic endoscope in the embodiment of this utility model;

[0035] Figure 2 This is a partial cross-sectional view of the ultrasonic endoscope in an embodiment of this utility model;

[0036] Figure 3 for Figure 2 A sectional view of plane A-A in the middle;

[0037] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0038] Figure 5 This is an exploded view of the injection port assembly and the fixing tube in an embodiment of this utility model;

[0039] Figure 6 This is a schematic diagram showing the positional relationship between the handle housing, instrument channel tube, clamping nut, and instrument anti-rotation pin in an embodiment of this utility model.

[0040] Figure 7 This is a schematic diagram of the connection structure of the fixing tube, the insertion tube sleeve, and the clamping ring in an embodiment of this utility model;

[0041] Figure 8 This is a schematic diagram of the inserted tube sleeve in an embodiment of this utility model.

[0042] Explanation of reference numerals in the attached drawings: 100, Insertion part; 110, Insertion tube; 120, Insertion tube sleeve; 121, Straight-knurled structure; 122, Axial opening; 123, External thread structure; 124, Annular groove; 125, Anti-rotation limiting through hole; 130, Head end seat; 140, Ultrasonic probe; 200, Operating part; 210, Handle housing; 220, Injection port handle; 230, Tail sleeve; 240, Fixing tube; 241, First opening; 2 42. Second opening; 243. First mounting hole; 244. Second mounting hole; 245. Third mounting hole; 246. Fourth mounting hole; 247. First threaded section; 248. Second threaded section; 249. Inner positioning protrusion ring; 250. Injection port assembly; 251. Injection port fixing block; 2511. Positioning opening ring; 2512. Inner inclined cavity; 2513. Threaded connection hole; 252. Injection port collar; 2521. Positioning post; 25 22. Pin groove; 253. Injection tube; 2531. Anti-rotation pin mounting groove; 254. Anti-rotation pin; 255. Fourth sealing ring; 256. Fifth sealing ring; 257. Injection locking ring; 258. Protective sleeve; 260. Instrument port assembly; 261. Instrument channel tube; 262. Compression nut; 263. Instrument anti-rotation pin; 264. Sixth sealing ring; 265. Seventh sealing ring; 266. Eighth sealing ring; 267. Pliers cap; 270. Operating... 280. Operating knob; 290. Operating dial; 310. Pressure ring; 320. Anti-rotation locking element; 330. Adjustable locking element; 331. Pointed end; 400. Injection channel; 410. Injection interface tube; 500. Instrument channel; 510. Instrument fixing block; 520. Instrument tee; 600. Mounting screw; 700. Handle fixing ring; 810. First sealing ring; 820. Second sealing ring; 830. Third sealing ring. Detailed Implementation

[0043] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Throughout the text, the terms "proximal end" and "distal end" refer to the distance relative to the operator. The end closer to the doctor or operator is the "proximal end," i.e., the end where the operator is located, and the end farther from the doctor or operator is the "distal end," i.e., the end where the ultrasound probe is located.

[0046] like Figure 1 and Figure 2 An ultrasound endoscope is shown, comprising an insertion part 100 and an operating part 200. The insertion part 100 is inserted into a body, and the operating part 200 is connected to the proximal end of the insertion part 100. The insertion part 100 includes an insertion tube 110, an insertion tube sleeve 120, and an insertion tip. The insertion tube 110 is inserted into the body being examined, and the insertion tube sleeve 120 is radially fixed to the outer periphery of the proximal end of the insertion tube 110 by multiple screws. The insertion tip includes a tip seat 130 connected to the distal end of the insertion tube 110 and an ultrasound probe 140 connected to the distal end of the tip seat 130. A water bladder (not shown) is installed on the outer periphery of the ultrasound probe 140.

[0047] like Figure 1 and Figure 2 As shown, the operating unit 200 includes a housing portion and an injection port assembly 250, an instrument port assembly 260, and a control assembly mounted on the housing portion. The housing portion includes a handle housing 210, an injection port handle 220, and a tail tube 230 arranged sequentially from proximal to distal. The injection port handle 220 has an injection port, and the injection port assembly 250 is mounted on the injection port; the handle housing 210 has an instrument channel port, and the instrument port assembly 260 is mounted on the instrument channel port. The installation directions of both the injection port assembly 250 and the instrument port assembly 260 are angled to the insertion direction of the insertion tube 110.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown, the ultrasound endoscope also includes an injection channel 400 and an instrument channel 500 disposed inside the insertion section 100 and the operation section 200, respectively, which are independently configured. The distal end of the injection channel 400 communicates with the water bladder, and the proximal end of the injection channel 400 communicates with the injection port assembly 250. The injection port assembly 250 can be fitted with a syringe or an injection pump, which can supply ultrasound media to the water bladder or extract ultrasound media from the water bladder through the injection port assembly 250 and the injection channel 400. The distal opening of the instrument channel 500 is disposed in the headstock 130, and the proximal end of the instrument channel 500 is connected to an instrument tee 520. One branch of the instrument tee 520 communicates with the instrument port assembly 260. Diagnostic instruments can extend outward from the headstock 130 through the instrument port assembly 260 and the instrument channel 500. The instrument channel 500 can also accommodate built-in wire harnesses or wires such as signal cables, image guides, optical fibers, fluid supply lines, bending wires, ultrasonic cables, and focusing wires.

[0049] like Figure 1 and Figure 2 As shown, the control components include an operation knob 270, operation buttons 280, and operation dial 290 mounted on the handle housing 210. The operation knob 270, operation buttons 280, and operation dial 290 are used to perform corresponding functions. For example, the operation knob 270 may include a horizontal bending knob that drives the insertion tube 110 to swing left and right in the horizontal direction via a horizontal bending wire, and the operation knob 270 may also include a vertical bending knob that drives the insertion tube 110 to swing up and down in the vertical direction via a vertical bending wire; the operation buttons 280 may include an illumination control button for controlling the opening and closing of the illumination module on the headstock 130, and the operation buttons 280 may also include an ultrasound control button for controlling the opening and closing of the ultrasonic probe 140; the operation dial 290 may include a clamping dial that pulls the clamping device to rotate via a clamping device drive wire, and the operation dial 290 may also include a focusing dial that moves the lens focusing group to adjust the focal length of the lens module via a focusing wire.

[0050] like Figure 2 and Figure 3 As shown, the operating unit 200 has a fixing tube 240 inside its outer casing. The fixing tube 240 is the basic component for fixing various parts inside the operating unit 200. The handle housing 210, the injection port handle 220, the tail sleeve 230, the injection port assembly 250, the instrument port assembly 260, and the insertion tube sleeve 120 are all fixedly connected to the fixing tube 240. Since the fixing tube 240 needs to be connected to many components, it needs to be provided with multiple mounting ports or mounting structures for installing various components.

[0051] like Figure 5 As shown, the wall of the fixed tube 240 is provided with a first opening 241, a second opening 242, a first mounting hole 243, a second mounting hole 244, a third mounting hole 245, and a fourth mounting hole 246 serving as mounting ports; the wall of the fixed tube 240 is also provided with a first threaded section 247 and a second threaded section 248 serving as mounting structures. The spaces within the first opening 241 and the second opening 242 are non-circular, and the second opening 242 is located near the end of the first opening 241. Both the first opening 241 and the second opening 242 are mounting ports with relatively large opening areas. The first mounting hole 243, the second mounting hole 244, the third mounting hole 245, and the fourth mounting hole 246 are all mounting openings with small opening areas, used only for mounting screws or pins. The first mounting hole 243 and the second mounting hole 244 are located on the pipe wall at the far end of the fixed pipe 240. The third mounting hole 245 is located near the first opening 241. The first threaded section 247 is located between the first opening 241 and the first mounting hole 243. The second threaded section 248 is located between the first opening 241 and the second opening 242. The fourth mounting hole 246 is located between the first opening 241 and the second threaded section 248.

[0052] like Figure 2 and Figure 5 As shown, one end of the fixing tube 240 extends into the handle housing 210. The handle housing 210 has a handle retaining ring 700 inside, which is threaded onto the second threaded section 248 of the fixing tube 240. The handle housing 210 is fixedly connected to the outer periphery of the fixing tube 240 via the handle retaining ring 700. The injection port assembly 250 includes an injection port collar 252 sleeved around the outer periphery of the fixing tube 240, located between the first threaded section 247 and the second threaded section 248 of the fixing tube 240. The injection port handle 220 is sleeved around the outer periphery of the injection port collar 252, which has a first sealing ring 810. The first sealing ring 810 seals between the injection port collar 252 and the handle housing 210. The tail sleeve 230 is threadedly fixed to the first threaded section 247 of the fixed tube 240. A second sealing ring 820 is fitted around the outer periphery of the proximal end of the tail sleeve 230, sealing the area between the tail sleeve 230 and the injection port handle 220. The first sealing ring 810 and the second sealing ring 820 achieve a seal between the fixed tube 240 and the injection port collar 252 as a whole, and the outer housing of the operating part 200. A third sealing ring 830 is fitted around the outer periphery of the proximal end of the insertion tube 110, sealing the area between the insertion tube 110 and the tail sleeve 230.

[0053] like Figure 2 , Figure 3 and Figure 5As shown, the injection port assembly 250 is fixedly connected to the first opening 241 of the fixed tube 240, and the injection port assembly 250 communicates with the injection interface tube 410 at the proximal end of the injection channel 400 within the fixed tube 240. The instrument port assembly 260 is fixedly connected to the second opening 242 of the fixed tube 240, and the instrument port assembly 260 communicates with a branch of the instrument tee 520 at the proximal end of the instrument channel 500 within the fixed tube 240.

[0054] like Figure 2 and Figure 5 As shown, the injection port assembly 250 includes an injection port fixing block 251, an injection port collar 252, an injection tube 253, an anti-rotation pin 254, a fourth sealing ring 255, a fifth sealing ring 256, an injection locking ring 257, and a protective sleeve 258. The injection port fixing block 251 includes a main body and a positioning opening ring 2511, both of which are integrally formed. The outer wall of the main body is an arc-shaped surface that fits against the inner wall of the fixing tube 240. The main body has a threaded connection hole 2513, which corresponds to the position of the third mounting hole 245 on the fixing tube 240. The injection port fixing block 251 and the fixing tube 240 are fixed together by screws passing through the third mounting hole 245 and threaded into the threaded connection hole 2513. The positioning opening ring 2511 is an annular structure protruding upwards from the outer wall of the main body, and its outer contour matches the shape of the first opening 241. When the injection port fixing block 251 is fixed to the fixing tube 240 by screws, the outer wall surface of the main body is in contact with the inner wall surface of the fixing tube 240, and the positioning opening ring 2511 extends into the first opening 241. The positioning opening ring 2511 and the first opening 241 are positioned and engaged to restrict the rotation of the injection port fixing block 251 around its own axis. An inner inclined cavity 2512 is also formed inside the injection port fixing block 251, and the injection interface tube 410 at the proximal end of the injection channel 400 communicates with the inner inclined cavity 2512.

[0055] like Figure 2 and Figure 5As shown, the injection port collar 252 is fitted around the outer periphery of the fixed tube 240. The injection port collar 252 includes a positioning post 2521 that is positioned corresponding to and internally penetrates the injection port fixing block 251. The positioning post 2521 is inclined relative to the injection port collar 252, and its axial direction is collinear with the axial direction of the inner inclined cavity 2512 inside the injection port fixing block 251. The injection tube 253 passes through the positioning post 2521 and extends into the inner inclined cavity 2511 inside the injection port fixing block 251. The injection port collar 252 is positioned on the outer periphery of the fixed tube 240 by the injection tube 253. The injection tube 253 has an external thread structure on its outer periphery. An injection locking ring 257 is threaded onto this external thread structure, and one end of the locking ring 257 abuts against the positioning post 2521 of the injection port sleeve 252. The locking ring 257 is used to lock the injection tube 253 onto the injection port sleeve 252. A protective sleeve 258 is fitted around the locking ring 257, providing protection.

[0056] like Figure 2 and Figure 5 As shown, to prevent the injection tube 253 from rotating after the syringe is inserted, the outer wall of the injection tube 253 is provided with an anti-rotation pin mounting groove 2531. The anti-rotation pin mounting groove 2531 is recessed into the external thread structure of the outer wall of the injection tube 253. One end of the anti-rotation pin 254 extends into the anti-rotation pin mounting groove 2531 and is fixedly connected to the injection tube 253 by a screw. The outer wall of the positioning post 2521 is provided with a pin groove 2522. The pin groove 2522 and the anti-rotation pin 254 are positioned correspondingly, and the other end of the anti-rotation pin 254 extends into the pin groove 2522. The anti-rotation pin 254 between the injection tube 253 and the injection port collar 252 can restrict the rotational freedom of the injection tube 253 and prevent the injection tube 253 from rotating after the syringe is inserted.

[0057] like Figure 2 and Figure 5 As shown, the fourth sealing ring 255 is disposed between the injection tube 253 and the injection port fixing block 251, and the fifth sealing ring 256 is disposed between the injection tube 253 and the positioning post 2521. The fourth sealing ring 255 and the fifth sealing ring 256 can achieve a seal between the injection tube 253 and the external components.

[0058] like Figure 2 and Figure 6As shown, an instrument tee 520 is fixed to the proximal end of the instrument channel 500, and one branch of the instrument tee 520 extends to the second opening 242. The instrument tee 520 is mounted on an instrument fixing block 510, which is fixedly connected to the fixing tube 240 by a pair of mounting screws 600. The mounting screws 600 pass through the fourth mounting hole 246 of the fixing tube 240 and are threaded to the instrument fixing block 510. The instrument port assembly 260 includes an instrument channel tube 261, a clamping nut 262, an instrument anti-rotation pin 263, a sixth sealing ring 264, a seventh sealing ring 265, an eighth sealing ring 266, and a clamping cap 267.

[0059] like Figure 2 and Figure 6 As shown, one end of the instrument channel tube 261 passes through the instrument channel opening of the handle housing 210, and the semi-circular protrusion at one end of the instrument channel tube 261 is placed behind the groove of a branch pipe of the instrument tee 520. Rotating the instrument channel tube 261 90 degrees assembles the instrument channel tube 261 and a branch pipe of the instrument tee 520 together. An instrument anti-rotation pin 263 is fixedly connected to the wall of the handle housing 210 corresponding to the instrument channel opening. A portion of the anti-rotation pin 263 is fixed inside the wall of the handle housing 210, and the other portion extends into a recess in the outer wall of the instrument channel tube 261. The anti-rotation pin 263 locks the handle housing 210 and the instrument channel tube 261, preventing the instrument channel tube 261 from rotating with the diagnostic instrument after it is installed. The clamping nut 262 is threaded onto the outer circumference of the instrument channel tube 261, and one end of the clamping nut 262 abuts against the instrument anti-rotation pin 263. The clamping nut 262 is used to axially clamp the instrument channel tube 261 to improve the installation reliability of the instrument channel tube 261. The clamp cap 267 is a soft rubber sleeve that is fastened to the other end of the instrument channel tube 261 to protect and seal the instrument channel tube 261.

[0060] like Figure 2 and Figure 6 As shown, the sixth sealing ring 264 is a U-shaped sealing ring, which is used to seal between the instrument channel tube 261 and one branch of the instrument tee 520; the seventh sealing ring 265 is an O-shaped sealing ring, which is used to seal between the instrument port assembly 260 and the handle housing 210; and the eighth sealing ring 266 is a rectangular sealing ring, which is used to seal between the instrument port assembly 260 and the handle housing 210. The sixth sealing ring 264, the seventh sealing ring 265, and the eighth sealing ring 266 ensure a good seal between the instrument port assembly 260, the handle housing 210, and the instrument tee 520.

[0061] like Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, the proximal end of the insertion tube 110 is fixed with an insertion tube sleeve 120 by screws. The insertion tube sleeve 120 is a tapered tube with a large proximal opening and a small distal opening, and the tube wall has an axial opening 122. The proximal end of the insertion tube sleeve 120 extends into the fixed tube 240 from the distal opening. The outer periphery of the proximal end of the insertion tube sleeve 120 is provided with an annular groove 124. The inner wall surface of the fixed tube 240 is provided with an inner positioning protrusion 249 that extends into the annular groove 124. The inner positioning protrusion 249 is embedded in the annular groove 124 and abuts against the groove wall of the annular groove 124. The inner positioning protrusion 249 and the annular groove 124 cooperate to achieve axial positioning of the fixed tube 240 and the insertion tube sleeve 120. Since the insertion sleeve 120 is a tapered tube with an axial opening 122, when the insertion sleeve 120 is inserted into the fixed tube 240, the insertion sleeve 120 can be radially narrowed to reduce the distance between the axial openings 122. The larger portion of the distal opening of the insertion sleeve 120 can extend into the interior of the fixed tube 240 beyond the inner positioning protrusion 249, so that the inner positioning protrusion 249 can cooperate with the annular groove 124 to achieve axial positioning of the fixed tube 240 and the insertion sleeve 120.

[0062] like Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, after the fixed tube 240 and the insertion tube sleeve 120 are initially axially positioned by the inner positioning protrusion 249 and the annular groove 124, due to unavoidable machining errors in the components, the inner positioning protrusion 249 and the annular groove 124 cannot be perfectly matched in size. Therefore, the fixed tube 240 and the insertion tube sleeve 120 can still move slightly in the axial direction. In order to achieve complete clamping of the fixed tube 240 and the insertion tube sleeve 120 after axial positioning, the outer wall of the insertion tube sleeve 120 is also provided with an external thread structure 123 located on the distal side of the annular groove 124. A clamping ring 310 is threadedly connected to the external thread structure 123, and the proximal end of the clamping ring 310 abuts against the distal end of the fixed tube 240. After the insertion tube sleeve 120 extends into the fixed tube 240 and is axially positioned within it, the clamping ring 310 is rotated. The proximal end of the clamping ring 310 abuts against the distal end of the fixed tube 240. Continued rotation of the clamping ring 310 causes axial relative movement between the fixed tube 240 and the insertion tube sleeve 120 until the side of the inner positioning protrusion 249 tightly abuts against the side wall of the annular groove 124, achieving axial clamping of the fixed tube 240 and the insertion tube sleeve 120 after axial positioning. Furthermore, to prevent the clamping ring 310 from loosening, adhesive can be added between the clamping ring 310 and the insertion tube sleeve 120 for fixation. This design reduces the precision requirements for the machining of the fixed tube 240 and the insertion tube sleeve 120, thus lowering the production and assembly costs of the ultrasonic endoscope.

[0063] like Figure 2 , Figure 3 and Figure 5 As shown, the fixed tube 240 is provided with an adjustable locking element 330. Multiple adjustable locking elements 330 are evenly arranged along the circumference of the fixed tube 240, and the adjustable locking elements 330 are movably connected to the fixed tube 240 along the radial direction. When the adjustable locking element 330 abuts against the outer wall of the insertion tube sleeve 120, the adjustable locking element 330 can completely lock the relative circumferential rotation between the insertion tube sleeve 120 and the fixed tube 240.

[0064] like Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, an anti-rotation locking member 320 is detachably connected between the fixed tube 240 and the insertion tube sleeve 120. When the anti-rotation locking member 320 passes through the fixed tube 240 and the insertion tube sleeve 120, the anti-rotation locking member 320 can restrict the insertion tube sleeve 120 from rotating relative to the fixed tube 240. In alternative embodiments, the anti-rotation locking member 320 can be omitted.

[0065] like Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, at least two anti-rotation locking elements 320 are provided along the circumference of the fixed tube 240; multiple adjustable locking elements 330 are evenly arranged along the circumference of the fixed tube 240. In some embodiments, two anti-rotation locking elements 320 are provided, located on opposite sides of the fixed tube 240; four adjustable locking elements 330 are provided, evenly arranged around the circumference of the fixed tube 240, with the angle between any two adjacent adjustable locking elements 330 being 90 degrees. It can be understood that the number of anti-rotation locking elements 320 and adjustable locking elements 330 is not limited to the above-mentioned number, and can be adaptively selected according to the needs of the locking effect. Specifically, the anti-rotation locking element 320 can be an anti-rotation screw, and the adjustable locking element 330 can be a pointed pin. The sleeve 120 has an anti-rotation limiting through hole 125 on its wall, corresponding to the position of the first mounting hole 243. An anti-rotation screw is threaded into both the first mounting hole 243 and the anti-rotation limiting through hole 125, and a pointed pin is threaded into the second mounting hole 244. After the anti-rotation screw and pointed pin are properly threaded, glue can be applied for further reinforcement to prevent them from loosening.

[0066] like Figure 3 and Figure 4As shown, to increase the friction between the adjustable locking member 330 and the fixed tube 240, the outer surface of the insertion sleeve 120 is provided with a knurled structure. The adjustable locking member 330 has a pointed end 331 facing the insertion sleeve 120. The pointed end 331 abuts against the knurled groove of the knurled structure to achieve locking. In some embodiments, the knurled structure can specifically be a straight-knurled structure 121 with a module of no more than 0.3, for example, a module of 0.2. The pointed end 331 is engaged in the straight-knurled groove between two adjacent straight lines of the straight-knurled structure 121 to achieve locking. Because the module of the straight-knurled structure 121 is small and the number of straight lines is relatively dense, the pointed end 331 of the adjustable locking member 330 can easily get engaged in the straight-knurled groove between two adjacent straight lines during the locking process or at a small rotation angle, thereby completely locking the rotational freedom of the insertion sleeve 120.

[0067] In the assembly process of this ultrasonic endoscope, the insertion part 100, the operating part 200, and other components such as the insertion tube 110, the insertion tube sleeve 120, the head end seat 130, and the ultrasonic probe 140 are assembled to form the entire insertion part 100. Then, the proximal end of the insertion tube sleeve 120 is inserted into the fixing tube 240. The insertion tube sleeve 120 and the fixing tube 240 are initially axially positioned using an annular groove 124 and an inner positioning protrusion 249. Next, the clamping ring 310 on the outer periphery of the insertion tube sleeve 120 is rotated. The clamping ring 310 causes the fixing tube 240 and the insertion tube sleeve 120 to move axially relative to each other until the side of the inner positioning protrusion 249 tightly abuts against the side wall of the annular groove 124, thus axially locking the fixing tube 240 and the insertion tube sleeve 120. The insertion tube sleeve 120 and the fixing tube 240 then form an axial... Rigid support; after the insertion sleeve 120 is axially locked, the adjustable locking member 330 is adjusted to a locking position that abuts against the outer wall of the insertion sleeve 120. The adjustable locking member 330 can lock the relative circumferential rotation of the insertion sleeve 120 and the fixed tube 240. If the anti-rotation locking member 320 and the anti-rotation limiting through hole 125 on the insertion sleeve 120 are aligned at this time, the anti-rotation locking member 320 is further used to penetrate the fixed tube 240 and the insertion sleeve 120. The anti-rotation locking member 320 and the adjustable locking member 330 cooperate to constrain the relative circumferential rotation of the insertion sleeve 120 and the fixed tube 240, completely locking the rotational freedom of the insertion sleeve 120; finally, the tail sleeve 230 is threaded to the outer circumference of the fixed tube 240, and the tail sleeve 230 and the fixed tube 240 are sealed with a third sealing ring 830. After the insertion part 100 and the operation part 200 are assembled, if the installation angle of the head end seat 130 does not meet the preset installation angle range, causing the ultrasonic endoscope to be unusable, the anti-rotation locking component 320 can be removed first, then the clamping ring 310 can be loosened, and finally the adjustable locking component 330 can be loosened. Then the installation angle of the insertion tube 110 fixing sleeve can be manually adjusted so that the installation angle of the head end seat 130 meets the preset installation angle range. At this time, the anti-rotation locking component 320 cannot be inserted into the anti-rotation limiting through hole 125 on the tube sleeve 120 and will no longer be installed. Finally, the clamping ring 310 is re-locked and the adjustable locking component 330 is tightened, and glue is applied for reinforcement. This can compensate for the problem that the installation angle of the head end seat 130 does not meet the assembly requirements due to assembly errors.

[0068] In summary, the ultrasonic endoscope provided by this embodiment of the present invention, by additionally providing multiple adjustable locking members 330 that are radially movable along the fixed tube 240, allows the insertion tube sleeve 120 to be disassembled after being combined with the operating part 200. This facilitates adjustment of the installation angle of the insertion tube sleeve 120 and the entire insertion part 100, thereby compensating for the problem that the installation angle of the head end seat 130 does not meet the assembly requirements due to assembly errors. This installation structure and angle adjustment method of the insertion part 100 allows for adjustment of the installation angle of the insertion part 100 through simple disassembly. The assemblability and maintainability of the insertion tube 110 are improved, reducing the assembly accuracy requirements and the operational difficulty caused by high-precision assembly requirements. It also reduces the dimensional accuracy requirements of components such as the insertion tube sleeve 120 and the fixed tube 240, thereby reducing production costs and improving product yield.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An ultrasonic endoscope, characterized in that, include: The insertion part (100) includes an insertion tube (110) for insertion into the body and an insertion tube sleeve (120) connected to the proximal end of the insertion tube (110); An operating part (200) is connected to the proximal end of the insertion part (100), the operating part (200) including a fixing tube (240), the proximal end of the insertion tube sleeve (120) extending into the fixing tube (240); A clamping ring (310) is threaded to the outer periphery of the insertion sleeve (120) and its proximal end abuts against the distal end of the fixing tube (240). The clamping ring (310) is used to achieve axial clamping of the insertion sleeve (120) and the fixing tube (240). An adjustable locking member (330) is movably connected to the fixed tube (240) radially; when the adjustable locking member (330) abuts against the outer wall of the insertion tube sleeve (120), the adjustable locking member (330) can completely lock the relative circumferential rotation between the insertion tube sleeve (120) and the fixed tube (240).

2. The ultrasonic endoscope according to claim 1, characterized in that, The outer surface of the insertion sleeve (120) is provided with a knurled structure, and the adjustable locking member (330) has a pointed end (331) facing the insertion sleeve (120). The pointed end (331) abuts against the knurled structure to achieve locking.

3. The ultrasonic endoscope according to claim 2, characterized in that, The knurling structure is a straight knurling structure (121), the module of the straight knurling structure (121) is not greater than 0.3, and the pointed end (331) is locked between two adjacent straight lines of the straight knurling structure (121).

4. The ultrasonic endoscope according to claim 1, characterized in that, Multiple adjustable locking elements (330) are evenly arranged along the circumference of the fixed tube (240).

5. The ultrasonic endoscope according to claim 1, characterized in that, The insertion tube sleeve (120) is a tapered tube with a large proximal opening and a small distal opening, and the tube wall is provided with an axial opening (122). The outer periphery of the insertion tube sleeve (120) is provided with an external thread structure (123). The clamping ring (310) is threaded to the external thread structure (123) on the outer periphery of the insertion tube sleeve (120) to axially clamp the insertion tube sleeve (120).

6. The ultrasonic endoscope according to claim 5, characterized in that, The outer periphery of the insertion sleeve (120) is also provided with an annular groove (124) located near the end of the external thread structure (123). The inner wall surface of the fixing tube (240) is provided with an inner positioning protrusion (249) extending into the annular groove (124). The inner positioning protrusion (249) cooperates with the annular groove (124) to realize the axial positioning of the fixing tube (240) and the insertion sleeve (120).

7. The ultrasonic endoscope according to any one of claims 1-6, characterized in that, Also includes: An anti-rotation locking member (320) is detachably connected to the fixed tube (240) and the insertion tube sleeve (120). When the anti-rotation locking member (320) passes through the fixed tube (240) and the insertion tube sleeve (120), the anti-rotation locking member (320) can restrict the relative circumferential rotation of the insertion tube sleeve (120) and the fixed tube (240).

8. The ultrasonic endoscope according to claim 7, characterized in that, At least two anti-rotation locking elements (320) are provided along the circumference of the fixing tube (240).

9. The ultrasonic endoscope according to claim 7, characterized in that, The fixed tube (240) has a first mounting hole (243) and a second mounting hole (244) on its wall, and the insert sleeve (120) has an anti-rotation limiting through hole (125) on its wall; the anti-rotation locking member (320) is detachably connected to the first mounting hole (243) and the anti-rotation limiting through hole (125); the adjustable locking member (330) is movably connected to the second mounting hole (244).

10. The ultrasonic endoscope according to any one of claims 1-6, characterized in that, The operating unit (200) is provided with an injection port assembly (250) and an instrument port assembly (260). The distal end of the insertion tube (110) is connected to a headstock (130), and the distal end of the headstock (130) is connected to an ultrasonic probe (140). A water bladder is installed around the ultrasonic probe (140). The insertion unit (100) and the operating unit (200) are internally provided with independent injection channels (400) and instrument channels (500). The distal end of the injection channel (400) communicates with the water bladder. The proximal end of the channel (400) is connected to the injection port assembly (250), the distal opening of the instrument channel (500) is disposed on the head end seat (130), and a branch line of the proximal end of the instrument channel (500) is connected to the instrument port assembly (260); the wall of the fixed tube (240) is provided with a first opening (241) and a second opening (242), the injection port assembly (250) is connected to the first opening (241), and the instrument port assembly (260) is connected to the second opening (242).

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